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      08-09-2014, 05:23 PM   #1
Grapesape
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Exhaust sound louder when hot?

I'm running the ESS full exhaust with HFC in Phoenix. It seems quite a bit louder in the afternoon than morning, when hot. Anyone else experience this? The sound quality is the same. It doesn't sound like there's a leak. Any thoughts?
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      08-09-2014, 05:46 PM   #2
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Originally Posted by Grapesape View Post
I'm running the ESS full exhaust with HFC in Phoenix. It seems quite a bit louder in the afternoon than morning, when hot. Anyone else experience this? The sound quality is the same. It doesn't sound like there's a leak. Any thoughts?
Personal i'm thinking in the afternoon your right foot is heavier!
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      08-09-2014, 07:18 PM   #3
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Sure, metal expands when it heated. Not sure if it gets louder but the tone is definitely different between a cold vs hot exhaust.
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      08-09-2014, 07:19 PM   #4
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I would think the opposite would be true. If you run on a cool foggy day air is denser and seems like it echos around more.
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      08-09-2014, 08:35 PM   #5
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+1 on different tone, unsure on loudness. I do tend to think it's a bit louder coming back through the pits after a track session than on the way out. (from Akrapovic perspective.)
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      08-09-2014, 08:43 PM   #6
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Maybe the heat increases the pressure inside the mufflers and subsequently increases the volume. I'm no physicist!
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      08-09-2014, 09:23 PM   #7
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Maybe the heat increases the pressure inside the mufflers and subsequently increases the volume. I'm no physicist!
Right its not rock science.
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      08-09-2014, 09:55 PM   #8
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My exhaust is generally louder when hot as well. Been that way with all the cars i've owned.
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